CN102504779B - Paraffin rosin water shutoff agent for water shutoff of heavy oil huff-puff well and water shutoff construction method - Google Patents
Paraffin rosin water shutoff agent for water shutoff of heavy oil huff-puff well and water shutoff construction method Download PDFInfo
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- CN102504779B CN102504779B CN 201110432488 CN201110432488A CN102504779B CN 102504779 B CN102504779 B CN 102504779B CN 201110432488 CN201110432488 CN 201110432488 CN 201110432488 A CN201110432488 A CN 201110432488A CN 102504779 B CN102504779 B CN 102504779B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000012188 paraffin wax Substances 0.000 title claims abstract description 55
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 49
- 238000010276 construction Methods 0.000 title claims abstract description 38
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 title claims abstract description 29
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 title claims abstract description 29
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 239000000295 fuel oil Substances 0.000 title abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 29
- 230000008014 freezing Effects 0.000 claims abstract description 6
- 238000007710 freezing Methods 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 239000011259 mixed solution Substances 0.000 claims abstract description 4
- 239000003129 oil well Substances 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 6
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 abstract description 28
- 230000002595 cold damage Effects 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 11
- 239000007788 liquid Substances 0.000 abstract description 8
- 208000009084 Cold Injury Diseases 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000000839 emulsion Substances 0.000 description 11
- 239000002981 blocking agent Substances 0.000 description 10
- 239000012071 phase Substances 0.000 description 10
- 238000011084 recovery Methods 0.000 description 8
- 235000020681 well water Nutrition 0.000 description 6
- 239000002349 well water Substances 0.000 description 6
- 239000003208 petroleum Substances 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000001993 wax Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003995 emulsifying agent Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000007764 o/w emulsion Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides a paraffin rosin water shutoff agent for water shutoff of a heavy oil huff-puff well and a water shutoff construction method. The water plugging agent for the thickened oil huff and puff well is a mixed solution prepared by adding water into paraffin and rosin. The water plugging construction method of the thickened oil huff and puff well comprises the following steps: the paraffin-rosin mixed liquid water shutoff agent is injected into a stratum to be treated for selective water shutoff, and the temperature of the water shutoff agent in the injection process is ensured to be higher than the freezing point temperature of paraffin and the softening point temperature of rosin. By utilizing the technology of the invention, because the construction temperature when the water plugging agent is injected is higher than the freezing point of the paraffin and the softening point of the rosin, the solid contents such as the paraffin, the rosin and the like and water form a liquid-liquid mixed phase, and the liquid-liquid mixed phase can easily enter the deep part of the stratum; after the water is squeezed into the stratum, paraffin and rosin are crystallized and separated out along with heat exchange when the temperature is lower than 55 ℃, and the paraffin and rosin are dissolved with oil and are unchanged with water, so that selective water plugging is realized; meanwhile, the problem of cold injury can be effectively avoided.
Description
Technical field
The invention belongs to heavy oil wells water-plugging technique field, specifically relate to a kind of viscous crude that is used for and handle up the adding the plugging agent that water is mixed with and utilizing this plugging agent to carry out the method for plug water construction of well water blockoff by paraffin, rosin.
Background technology
In the present petroleum industry, the chemical water plugging poor selectivity, the water blockoff success ratio is low, and the selective water shut-off way is few.For realizing steady oil control water, increase crude production rate, Liaohe Oil Field company invention team develops the paraffin wax emulsion water-plugging technique.
The paraffin wax emulsion water-plugging technique is a kind of selective water shut-off technology, mainly be by paraffin being carried out modification, adding emulsifying agent it is dispersed into oil-in-water emulsion, adopt conventional form of construction work, after under normal temperature condition, modified paraffin milk sap being clamp-oned the stratum, add a certain amount of emulsion splitter again, with its breakdown of emulsion, making wax crystalline substance etc. contain thing admittedly separates out, be gathered into large-size particle, the shutoff water exit is realized selective water shut-off.Relevant paraffin wax emulsion water-plugging technique can be referring to document: CN1644647A " compound method of modified paraffin selective water shutoff agent "; " modified paraffin selective water shut-off technical study and rig-site utilization ", Li Jinquan, " special reservoirs " the 14th the 4th phase of volume, in August, 2007: 79-80; " paraffin wax emulsion selective water shut-off technology ", Gao Yujun, " oilfield chemistry " 2008 the 25th volumes (4): 342-344; " modified paraffin selective water shut-off technology desk research and test in place ", Zhang Shuhua, " special reservoirs " 2007 the 14th volume z1 phases; " development of modified paraffin selective water shutoff agent reaches in Jinzhou oilfield application ", Wang Fengzhu, " Inner Mongol petrochemical complex " 2010 the 36th the 14th phases of volume; Deng.
Yet above-mentioned paraffin wax emulsion water-plugging technique is used for the heavy oil wells water blockoff, because the high temperature sensitive property of viscous crude can cause viscous crude chance condensation knot in the stratum, the row's of returning difficulty forms cold damage, influences water plugging effect.
Cold damage is meant mainly that at present high wax containing well is (referring to " early stage cold water injection exploitation is to the cold damage of high content of wax high-solidification point oil reservoir ", Tian Nailin, Feng's accumulation, a beautiful jade, Zhang Lihua, Shanghai Metallurgy Inst., Chinese Academy of Sciences, " Materials Physics and Chemistry Ph D dissertation " 2000 years; " northern lakelet oil field oil reservoir cold damage experimental study ", Liu Huiqing, yellow partly cloudy, Bi Guoqiang, Zhang Zelan, Guo Yunyao, petroleum engineering institute of University of Petroleum, tell and breathe out three Tang Hu oil recovery factories, oil field, petroleum engineering institute of University of Petroleum, Shandong Dongying, Shandong Dongying, Hami) and the chemical agent of super viscous crude is handled up and carbonic acid gas is handled up etc., maximum is with cooperating steam treatment to construct, utilize the heat of steam to solve the problem of cold damage.Aspect viscous crude production, seldom there is document to mention the problem of water blockoff measure cold damage, there is not concrete terms of settlement yet.
Summary of the invention
Main purpose of the present invention is to provide a kind of handle up water-blocking construction method of well of viscous crude that is applicable to, avoids and solve the cold damage problem that traditional shutoff method brings the viscous crude recovery well.On this basis, another object of the present invention is to provide a kind of handle up plugging agent of well water-blocking construction method of this viscous crude that is applicable to.
For reaching above-mentioned purpose, on the one hand, the invention provides a kind of handle up plugging agent of well water blockoff of viscous crude that is applicable to, this plugging agent mainly is to add the formulated mixed solution of water by paraffin and rosin.Also this plugging agent is called " paraffin-rosin plugging agent " among the present invention or abbreviates " paraffin-rosin mixed solution plugging agent " as.
On the other hand, the invention provides and utilize described plugging agent to carry out the method that viscous crude is handled up the well plug water construction, this method comprises: paraffin of the present invention-rosin plugging agent is injected pending stratum carry out selective water shut-off, and, guarantee that the temperature of plugging agent in injection process is at the freezing point temperature of paraffin and more than the rosiny softening point temperature.
Plugging agent of the present invention and water-blocking construction method, mainly be zero pour characteristic and the rosiny softening temperature characteristic of having utilized paraffin, the freezing point temperature of paraffin is generally about 60 ℃, and rosin of the present invention is selected the rosin of heatproof difference for use, and for example softening temperature is at the rosin of (70～75 ℃) below 75 ℃.Among the present invention, because the construction temperature when injecting plugging agent is higher than the zero pour and the rosiny softening temperature of paraffin, paraffin and rosin etc. contain thing admittedly and water forms liquid-liquid mixed phase (paraffin, rosin mixes the back agitation as appropriate with water evenly can inject construction, because implantation temperature is higher than the zero pour and the rosiny softening temperature of paraffin, paraffin, water all is fluid, rosin adopts the less colophonium powder of particle diameter, after softening also is fluid basically, the three mixes inequality or emulsification is not fine, can not influence construction quality yet, do not need to add the prior paraffin plugging agent the emulsifying agent that must add), be easy to enter earth formation deep; After clamp-oning the stratum, along with heat exchange, when temperature is lower than paraffin and rosiny zero pour particularly below 55 ℃ the time, paraffin and CRYSTALLIZATION OF ROSIN are separated out, and it meets the oil dissolving, it is constant to meet water, thereby realizes selective water shut-off.On the other hand, the contriver finds in research process, when temperature in the construction process is higher than 70 ℃, the water blockoff intensity of simple paraffin and water mixed liquid can descend to some extent, and in the plugging agent of the present invention, rosiny adds can effectively improve plugging agent intensity, has improved the validity period of oilwell water shutoff.
According to specific embodiments of the present invention, the zero pour that requires used paraffin among the present invention is in 55～70 ℃ of preferred 55～65 ℃ of scopes, described rosin is preferably the colophonium powder of softening temperature below 75 ℃, particle diameter 0.1～1mm, and concrete paraffin and rosin kind are not had particular requirement, can be modification or non-modified product, for example, be applicable to that paraffin of the present invention can be industrial paraffin 52,54,56,58 etc., rosin can be the low colophonium powder through grinding of rank, can require construction temperature to guarantee that rosin is only softening when specifically implementing and differs and finish fusing surely.
According to specific embodiments of the present invention, the viscous crude that is applicable to of the present invention is handled up in the plugging agent of well water blockoff, and described paraffinicity is preferably 20wt%～30wt% more than 20wt%, more preferably at 25wt%～30wt%.
According to specific embodiments of the present invention, the viscous crude that is applicable to of the present invention is handled up in the plugging agent of well water blockoff, and described rosiny mass content is preferably 5wt%～10wt% more than 5wt%.
Except that specifying, ratio described in the present invention and content are part by weight and content.
According to specific embodiments of the present invention, the viscous crude that is applicable to of the present invention is handled up in the plugging agent of well water blockoff, described water can be oilfield sewage, for guaranteeing construction temperature, water temperature should be greater than the freezing point temperature and the rosiny softening point temperature of paraffin, usually require water temperature more than 70 ℃, preferred more than 75 ℃, more preferably more than 80 ℃.According to the zero pour and the rosiny softening temperature of concrete paraffin, can suitably adjust construction temperature, guarantee that the plugging agent temperature is in the zero pour of paraffin with more than the rosiny softening temperature.Be appreciated that under the prerequisite that guarantees water plugging effect of the present invention, do not advise using the paraffin and the rosin of high softening-point.
Plugging agent of the present invention and water-blocking construction method mainly are to design at causing the handling up well of cold damage, that is to say, plugging agent of the present invention and water-blocking construction method are applicable to that formation temperature is at the high water-cut well in latter stage of handling up of the viscous crude below 50 ℃.
When utilizing plugging agent of the present invention to carry out plug water construction, except that guaranteeing that the plugging agent implantation temperature is in the zero pour of paraffin with more than the rosiny softening point temperature, displacing liquid also is the hot sewage more than 70 ℃, its construction process and processing parameter can carry out according to the water-plugging technology of prior art, normally adopt at a slow speed and inject, can make plugging agent preferentially enter high permeability formation and carry out shutoff.When the present invention specifically implements, can increase a truck with boiler at the scene, provide heat to guarantee construction temperature.
According to specific embodiments of the present invention, be under the situation of motionless oil well pipe, from the oil jacket annular space plugging agent of the present invention is pressed 0.2～0.3m
3/ minute speed is clamp-oned the stratum, and the control entry pressure is lower than 15MPa, clamp-oning construction and finishing back closing well 3 days, and normally opening well and making production gets final product.
Adopt plugging agent of the present invention, effective water blockoff component content wherein is higher, can reach 30% or higher very easily, and blocking agent intensity is promoted significantly.Than before, because blocking agent intensity is improved, can be used for the big oil well of water outlet intensity.
Water-plugging technique of the present invention has the following advantages:
1, utilizes water-blocking construction method of the present invention,, can prevent effectively that low temperature from causing cold damage to the stratum, increase oil pump capacity, prolong fuel-displaced validity period because whole construction course is in more than the relatively-high temperature state (70 ℃).
2, utilize method of the present invention, do not need to add emulsifying agent preparation paraffin wax emulsion during blocking agent in preparation, do not need to inject emulsion splitter after blocking agent is injected the stratum yet, its expense integral construction temperature that is used to raise, not increasing under the condition of cost, can finish same construction task.
3, utilize method of the present invention, fixed tubular column adopts former tubing string construction, can save operating cost and production time.
4, utilize method of the present invention, than the plugging agent of prior art, effectively the water blockoff component content is higher in the blocking agent of the present invention, and water blockoff intensity is big, and liquid phase helps entering the oil reservoir deep, can enlarge the water blockoff radius, can effectively improve the validity period of oilwell water shutoff.
Embodiment
Below describe the enforcement of technical solution of the present invention and the beneficial effect of generation in detail by specific embodiment, be intended to help the reader to understand essence of the present invention and characteristics better, but not as qualification to this case practical range.
Embodiment 1
Certain oil well adopts conventional modified paraffin milk sap construction, prepares blocking agent water generally below 25 ℃, the heavy oil wells early period of origination draining after the construction, not fuel-displaced phenomenon, after general 10 days, just can see the oil increasing precipitation effect, think that the viscous crude in the stratum is met the condensation knot, form cold damage, treat that the formation temperature recovery is just normal, in addition, under the low-temperature condition, wax crystal is too early, be unfavorable for entering earth formation deep, cause validity period to shorten.
At this oil well, adopt plugging agent of the present invention and plug water construction technology, concrete operations are as follows:
With 20 meters of core intersections is example:
The preparation temperature is 80 ℃, and effectively selective water shutoff agent 60 sides of paraffinicity 20%+ rosin content 5% are on-the-spot by truck with boiler assurance blocking agent temperature, by pump truck blocking agent pressed 0.2～0.3m
3/ minute speed is clamp-oned oil reservoir, and the control entry pressure is lower than 15MPa, and displacing liquid is 15～20 sides.Construction back closing well 3 days, conventional construction closing well 5 days.Opening well and making production then.
Specific embodiment: Jin611-15-16Jing.This well 2003.05.12 goes into operation, 830.8-1028.5m, in the building+and prosperous table oil floor, 32.1 meters/9 layers, average effective porosity 24.02, stratum mean permeability 0.9826 μ m
2, in-place oil viscosity 1526mPa.s, construction on May 22nd, 2009, the preparation temperature is 80 ℃, and effectively selective water shutoff agent 90 sides of paraffinicity 20%+ rosin content 5% are on-the-spot by truck with boiler assurance blocking agent temperature, by pump truck blocking agent is clamp-oned oil reservoir from the oil jacket annular space, displacing liquid is hot sewage 20 sides.Construction back closing well 3 days.After driving a well, increase oily 1016.8t, precipitation 6131.8m
3, validity period 198d.
2009-2010, the present invention test 16 wells, increase oily 9775t, increased oil 610.9t, average effective phase 177d implements before the present invention (with 2006～2007 years, oil recovery factory, Jinzhou uses paraffin wax emulsion selective water shut-off technology 11 wells, and accumulative total increases oily 6093.5t, precipitation 12515.41m
3, average effective phase 154d, " paraffin wax emulsion selective water shut-off technology ", Gao Yujun, " oilfield chemistry " 2008 the 25th volumes (4): 342-344 compares), individual well increases 57 tons of the average increases of oil, and the average effective phase prolongs 23 days.(2005 and 2006, modified paraffin selective water shut-off technology was tested 11 wells in oil recovery factory, Jinzhou, add up to increase oily 3093.5t, tired precipitation 12515.41m with other prior aries
3, average effective phase 84d." modified paraffin selective water shut-off technology desk research and test in place ", Zhang Shuhua, " special reservoirs " 2007 the 14th volume z1 phases; Accumulative total was implemented 16 wells successively in oil recovery factory, Jinzhou, Liaohe Oil Field and Liaohe Oil Field dawn oil recovery factory rig-site utilization in 2005～2006 years, and measure is efficient 96.17%, and average individual well increases oily 187t." modified paraffin selective water shut-off technical study and rig-site utilization ", Li Jinquan, " special reservoirs " the 14th the 4th phase of volume, in August, 2007: 79-80) compare, had especially to increase substantially.
The present invention also can be used for other water base oilwell water shutoff, the cold damage problem that solution may bring the viscous crude recovery well.
Claims (8)
1. viscous crude well water-blocking construction method of handling up, this method comprises:
A kind of plugging agent is injected pending stratum carry out selective water shut-off, this plugging agent is for to add the formulated mixed solution of water by paraffin and rosin, and, guarantee that the temperature of plugging agent in injection process is at the freezing point temperature of paraffin and more than the rosiny softening point temperature.
2. method according to claim 1, wherein, the described viscous crude well of handling up is a formation temperature at the high water-cut well in latter stage of handling up of the viscous crude below 50 ℃.
3. method according to claim 1, wherein, in the described plugging agent, described paraffin is the modification of 55～70 ℃ at zero pour or the paraffin of non-modification, described rosin is softening temperature below 75 ℃, the modification of particle diameter 0.1～1mm or the colophonium powder of non-modification.
4. method according to claim 1, wherein, the paraffinicity in the described plugging agent is more than 20wt%.
5. method according to claim 4, wherein, the paraffinicity in the described plugging agent is 20wt%～30wt%.
6. method according to claim 1, wherein, the rosin content in the described plugging agent is more than 5wt%.
7. method according to claim 6, wherein, the rosin content in the described plugging agent is 5wt%～10wt%.
8. according to each described method of claim 1～7, this method comprises:
Under the situation of motionless oil well pipe, described plugging agent is pressed 0.2～0.3m from the oil jacket annular space
3/ minute speed is clamp-oned the stratum, and the control entry pressure is lower than 15MPa, clamp-oning construction and finishing back closing well 3 days, normally opening well and making production.
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| CN 201110432488 CN102504779B (en) | 2011-12-21 | 2011-12-21 | Paraffin rosin water shutoff agent for water shutoff of heavy oil huff-puff well and water shutoff construction method |
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| CN 201110432488 CN102504779B (en) | 2011-12-21 | 2011-12-21 | Paraffin rosin water shutoff agent for water shutoff of heavy oil huff-puff well and water shutoff construction method |
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| CN107828394A (en) * | 2017-11-23 | 2018-03-23 | 长江大学 | A kind of diverting agent and preparation method thereof |
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| CN102877811B (en) * | 2012-09-21 | 2016-02-10 | 中国石油天然气股份有限公司 | Selective plugging ball for profile control of water injection well and preparation method and application thereof |
| CN107882531B (en) * | 2017-12-01 | 2020-10-09 | 中国石油天然气股份有限公司 | Selective water control channeling sealing method for flooding production well of water-flooded oil reservoir |
| CN109504358A (en) * | 2018-12-19 | 2019-03-22 | 新疆贝肯能源工程股份有限公司 | It can de-plugging environment-friendly resin sealing agent and preparation method thereof |
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| CA1023239A (en) * | 1973-05-01 | 1977-12-27 | Leroy L. Carney | Water-in-oil emulsions and emulsifiers for preparing the same |
| US4233162A (en) * | 1978-02-07 | 1980-11-11 | Halliburton Company | Oil well fluids and dispersants |
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| CN107828394A (en) * | 2017-11-23 | 2018-03-23 | 长江大学 | A kind of diverting agent and preparation method thereof |
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